Vehicle HUD Pitching Correction via Gyro Sensor
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Solution Overview
Problem
Existing head-up display systems struggle to accurately correct the display position of images on a vehicle's windshield during vehicle vibrations, particularly pitching shakes and shift shakes, leading to discomfort and distraction for drivers, especially during curve travel.
Innovation Solution
A head-up display system equipped with gyro and acceleration sensors that perform pitching corrections based on angular velocity and acceleration information, and calculates rotation and shift shakes to adjust the display position, while considering the driver's perspective, using damping terms to suppress unnecessary corrections during curve travel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If pitching correction is performed using gyro sensor during curve travel, then display position stability is improved, but the display image moves in a direction having no relationship with the pitching shake, causing driver confusion
Solution Approach 1:
The patent applies different correction strategies to different types of objects displayed on the HUD. Constantly displayed objects (like navigation routes) have correction suppressed during curve travel, while real scene overlaid objects (like speed information) continue to receive correction. This local differentiation resolves the contradiction by preventing confusion for objects that should remain stable while maintaining accuracy for objects that should follow vehicle motion.
Solution Approach 2:
The system dynamically adjusts the correction amount based on vehicle state. During curve travel, the correction for constantly displayed objects is suppressed or stopped, while correction for real scene overlaid objects is maintained. This dynamic adjustment allows the system to adapt to different driving conditions and object types, resolving the contradiction between stability and perception accuracy.
2Measurement precision
If high accuracy correction is performed for pitching shake, then display precision is improved, but correction processing becomes more complex requiring additional sensors and calculations
Solution Approach 1:
The patent uses a single gyro sensor to perform multiple functions: detecting pitching shake for correction, detecting curve travel states, and providing data for both constantly displayed objects and real scene overlaid objects. This multi-functionality reduces the need for additional sensors while maintaining high correction accuracy.
Solution Approach 2:
The system performs correction selectively rather than uniformly. For constantly displayed objects during curve travel, correction is suppressed or stopped (partial action), while for real scene overlaid objects, full correction is applied. This selective approach reduces calculation complexity while maintaining necessary accuracy where required.
3Measurement precision
If correction processing is performed considering driver perspective position, then display accuracy relative to driver is improved, but system complexity increases requiring perspective detection devices
Solution Approach 1:
The system uses the driver's own perspective position information to perform self-correction. The perspective detection device detects the driver's position, and this information is used to adjust the correction amounts for different objects. The system serves itself by using readily available sensor data (gyro, perspective detection) without requiring additional complex subsystems.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system effectively stabilizes the display position, preventing unnecessary movements and maintaining driver attention by accurately accounting for vehicle vibrations and driver perspective, thus enhancing safe driving.
Implementation Method 1
angular velocity information for two axial directions acquired by the gyro sensor
Implementation Method 2
acceleration information acquired by the acceleration sensor
Data Source
AI summary
A head-up display system mounted on a vehicle, the system including: a head-up display device that displays an image in front of the vehicle; and a forward sensing device that detects a forward object of the vehicle, the head-up display device including an image data generation unit, and an image display unit, the image data generated by the image data generation unit including a constantly displayed object, and a real scene overlaid object, a gyro sensor being installed in the vehicle, the image data generation unit performing pitching correction on a display position of an object to be displayed, based on angular velocity information for two axial directions, and in a case where the vehicle travels on a curve in an inclined state, the pitching correction being suppressed or stopped, and a brightness of display of the real scene overlaid object being reduced or stopped.